Here is the rotary cutter that I have that works.
http://www.youtube.com/watch?v=p3kdYDbj0aE
This phase of my quilting life I tend to buy the tools that will make the parts of quilting I find tedious more fun.
I bought the Acuquilt Go, and the Simplicity Bias Binding machine.
I had a lot of trouble with the Pounce until I learned to use it the right way, now it works just fine.
http://www.youtube.com/watch?v=UZvWVNJHHqs